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Merge pull request #36 from ramapcsx2/n64_speedup

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n64_speedup
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sanni 2019-08-29 07:09:27 +02:00 committed by GitHub
commit 95ba179b74
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6 changed files with 115 additions and 101 deletions
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5
Cart_Reader/Cart_Reader.ino
View File

@ -145,6 +145,11 @@ SdFile myFile;
#define mode_PCE 13
#define mode_SV 14
/******************************************
optimization-safe nop delay
*****************************************/
#define NOP __asm__ __volatile__ ("nop\n\t")
/******************************************
Variables
*****************************************/

6
Cart_Reader/GB.ino
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@ -449,7 +449,7 @@ void readROM_GB() {
unsigned int calc_checksum_GB (char* fileName, char* folder) {
unsigned int calcChecksum = 0;
int calcFilesize = 0;
// int calcFilesize = 0; // unused
unsigned long i = 0;
int c = 0;
@ -458,7 +458,7 @@ unsigned int calc_checksum_GB (char* fileName, char* folder) {
// If file exists
if (myFile.open(fileName, O_READ)) {
calcFilesize = myFile.fileSize() * 8 / 1024 / 1024;
//calcFilesize = myFile.fileSize() * 8 / 1024 / 1024; // unused
for (i = 0; i < (myFile.fileSize() / 512); i++) {
myFile.read(sdBuffer, 512);
for (c = 0; c < 512; c++) {
@ -959,7 +959,7 @@ void writeFlash_GB(byte MBC) {
// Go back to file beginning
myFile.seekSet(0);
unsigned int addr = 0;
//unsigned int addr = 0; // unused
writeErrors = 0;
// Verify flashrom

2
Cart_Reader/GBA.ino
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@ -768,8 +768,6 @@ void getCartInfo_GBA() {
else {
char tempStr2[2];
char tempStr[5];
char sizeStr[3];
char saveStr[2];
// cart not in list
cartSize = 0;

187
Cart_Reader/N64.ino
View File

@ -68,11 +68,10 @@ static const char N64CartMenuItem5[] PROGMEM = "Reset";
static const char* const menuOptionsN64Cart[] PROGMEM = {N64CartMenuItem1, N64CartMenuItem2, N64CartMenuItem3, N64CartMenuItem4, N64CartMenuItem5};
// N64 CRC32 error menu items
static const char N64CRCMenuItem1[] PROGMEM = "Recalc CRC";
static const char N64CRCMenuItem2[] PROGMEM = "Redump";
static const char N64CRCMenuItem3[] PROGMEM = "Ignore";
static const char N64CRCMenuItem4[] PROGMEM = "Reset";
static const char* const menuOptionsN64CRC[] PROGMEM = {N64CRCMenuItem1, N64CRCMenuItem2, N64CRCMenuItem3, N64CRCMenuItem4};
static const char N64CRCMenuItem1[] PROGMEM = "Redump";
static const char N64CRCMenuItem2[] PROGMEM = "Ignore";
static const char N64CRCMenuItem3[] PROGMEM = "Reset";
static const char* const menuOptionsN64CRC[] PROGMEM = {N64CRCMenuItem1, N64CRCMenuItem2, N64CRCMenuItem3};
// Rom menu
static const char N64RomItem1[] PROGMEM = "4MB";
@ -528,25 +527,26 @@ static word addrCRC(word address) {
return address | crc;
}
static byte dataCRC(byte * data) {
byte ret = 0;
for (byte i = 0; i <= 32; i++) {
for (byte j = 7; j >= 0; j--) {
int tmp = 0;
if (ret & 0x80) {
tmp = 0x85;
}
ret <<= 1;
if ( i < 32 ) {
if (data[i] & (0x01 << j)) {
ret |= 0x1;
}
}
ret ^= tmp;
}
}
return ret;
}
// unused
//static byte dataCRC(byte * data) {
// byte ret = 0;
// for (byte i = 0; i <= 32; i++) {
// for (byte j = 7; j >= 0; j--) {
// int tmp = 0;
// if (ret & 0x80) {
// tmp = 0x85;
// }
// ret <<= 1;
// if ( i < 32 ) {
// if (data[i] & (0x01 << j)) {
// ret |= 0x1;
// }
// }
// ret ^= tmp;
// }
// }
// return ret;
//}
/******************************************
N64 Controller Protocol Functions
@ -554,7 +554,6 @@ static byte dataCRC(byte * data) {
void N64_send(unsigned char *buffer, char length) {
// Send these bytes
char bits;
bool bit;
// This routine is very carefully timed by examining the assembly output.
// Do not change any statements, it could throw the timings off
@ -1136,7 +1135,7 @@ void printCartInfo_N64() {
}
}
// CRC32 lookup table
// CRC32 lookup table // 256 entries
static const uint32_t crc_32_tab[] PROGMEM = { /* CRC polynomial 0xedb88320 */
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
@ -1183,33 +1182,6 @@ static const uint32_t crc_32_tab[] PROGMEM = { /* CRC polynomial 0xedb88320 */
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
};
// Calculate dumped rom's CRC32
inline uint32_t updateCRC32(uint8_t ch, uint32_t crc) {
uint32_t idx = ((crc) ^ (ch)) & 0xff;
uint32_t tab_value = pgm_read_dword(crc_32_tab + idx);
return tab_value ^ ((crc) >> 8);
}
// Read rom from sd
uint32_t crc32() {
if (myFile.open(fileName, O_READ)) {
uint32_t oldcrc32 = 0xFFFFFFFF;
for (unsigned long currByte = 0; currByte < cartSize * 2048; currByte++) {
myFile.read(sdBuffer, 512);
for (int c = 0; c < 512; c++) {
oldcrc32 = updateCRC32(sdBuffer[c], oldcrc32);
}
}
// Close the file:
myFile.close();
return ~oldcrc32;
}
else {
print_Error(F("File not found"), true);
}
}
// look-up the calculated crc in the file n64.txt on sd card
boolean searchCRC(char crcStr[9]) {
boolean result = 0;
@ -1269,8 +1241,6 @@ boolean searchCRC(char crcStr[9]) {
void getCartInfo_N64() {
char tempStr2[2];
char tempStr[5];
char sizeStr[3];
char saveStr[2];
// cart not in list
cartSize = 0;
@ -2103,36 +2073,94 @@ readn64rom:
print_Error(F("SD Error"), true);
}
for (unsigned long currByte = romBase; currByte < (romBase + (cartSize * 1024 * 1024)); currByte += 512) {
// get current time
unsigned long startTime = millis();
byte buffer[1024];
// run combined dumper + crc32 routine for better performance, as N64 ROMs are quite large for an 8bit micro
// currently dumps + checksums a 32MB cart in 170 seconds (down from 347 seconds)
uint32_t oldcrc32 = 0xFFFFFFFF;
uint32_t tab_value = 0;
uint8_t idx = 0;
for (unsigned long currByte = romBase; currByte < (romBase + (cartSize * 1024 * 1024)); currByte += 1024) {
// Blink led
if (currByte % 16384 == 0)
PORTB ^= (1 << 4);
// Set the address for the next 512 bytes
// Set the address for the first 512 bytes to dump
setAddress_N64(currByte);
// Wait 62.5ns (safety)
NOP;
for (int c = 0; c < 512; c += 2) {
// split word
word myWord = readWord_N64();
byte loByte = myWord & 0xFF;
byte hiByte = myWord >> 8;
// Pull read(PH6) low
PORTH &= ~(1 << 6);
// Wait ~310ns
NOP; NOP; NOP; NOP; NOP;
// write to buffer
sdBuffer[c] = hiByte;
sdBuffer[c + 1] = loByte;
// data on PINK and PINF is valid now, read into sd card buffer
buffer[c] = PINK; // hiByte
buffer[c + 1] = PINF; // loByte
// Pull read(PH6) high
PORTH |= (1 << 6);
// crc32 update
idx = ((oldcrc32) ^ (buffer[c])) & 0xff;
tab_value = pgm_read_dword(crc_32_tab + idx);
oldcrc32 = tab_value ^ ((oldcrc32) >> 8);
idx = ((oldcrc32) ^ (buffer[c + 1])) & 0xff;
tab_value = pgm_read_dword(crc_32_tab + idx);
oldcrc32 = tab_value ^ ((oldcrc32) >> 8);
}
myFile.write(sdBuffer, 512);
// Set the address for the next 512 bytes to dump
setAddress_N64(currByte + 512);
// Wait 62.5ns (safety)
NOP;
for (int c = 512; c < 1024; c += 2) {
// Pull read(PH6) low
PORTH &= ~(1 << 6);
// Wait ~310ns
NOP; NOP; NOP; NOP; NOP;
// data on PINK and PINF is valid now, read into sd card buffer
buffer[c] = PINK; // hiByte
buffer[c + 1] = PINF; // loByte
// Pull read(PH6) high
PORTH |= (1 << 6);
// crc32 update
idx = ((oldcrc32) ^ (buffer[c])) & 0xff;
tab_value = pgm_read_dword(crc_32_tab + idx);
oldcrc32 = tab_value ^ ((oldcrc32) >> 8);
idx = ((oldcrc32) ^ (buffer[c + 1])) & 0xff;
tab_value = pgm_read_dword(crc_32_tab + idx);
oldcrc32 = tab_value ^ ((oldcrc32) >> 8);
}
// write out 1024 bytes to file
myFile.write(buffer, 1024);
}
// Close the file:
myFile.close();
// print elapsed time
print_Msg(F("Time elapsed: "));
print_Msg((millis() - startTime) / 1000);
println_Msg(F("s"));
display_Update();
if (n64crc) {
calcn64crc:
// Calculate Checksum and convert to string
println_Msg(F("Calculating CRC.."));
println_Msg(F("Checking CRC.."));
display_Update();
// convert checksum to string
char crcStr[9];
sprintf(crcStr, "%08lx", crc32());
sprintf(crcStr, "%08lx", ~oldcrc32);
// Print checksum
println_Msg(crcStr);
display_Update();
@ -2145,26 +2173,21 @@ calcn64crc:
else {
// Dump was bad or unknown
rgb.setColor(255, 0, 0);
// let bad crc show a short while
delay(3000);
// N64 CRC32 error Menu
unsigned char CRCMenu;
// Copy menuOptions out of progmem
convertPgm(menuOptionsN64CRC, 4);
convertPgm(menuOptionsN64CRC, 3);
CRCMenu = question_box(F("CRC ERROR "), menuOptions, 4, 1);
CRCMenu = question_box(F("CRC ERROR "), menuOptions, 3, 0);
// wait for user choice to come back from the question box menu
switch (CRCMenu)
{
case 0:
// Change to last directory
sd.chdir(folder);
display_Clear();
// Calculate CRC again
rgb.setColor(0, 0, 0);
goto calcn64crc;
break;
case 1:
// Change to last directory
sd.chdir(folder);
// Delete old file
@ -2182,11 +2205,11 @@ calcn64crc:
goto readn64rom;
break;
case 2:
case 1:
// Return to N64 menu
break;
case 3:
case 2:
// Reset
resetArduino();
break;

12
Cart_Reader/PCE.ino
View File

@ -36,7 +36,7 @@ void pin_init_PCE(void);
void setup_cart_PCE(void);
void reset_cart_PCE(void);
uint8_t read_byte_PCE(uint32_t address);
uint8_t write_byte_PCE(uint32_t address, uint8_t data);
void write_byte_PCE(uint32_t address, uint8_t data);
uint32_t detect_rom_size_PCE(void);
void read_bank_PCE(uint32_t address_start, uint32_t address_end, uint32_t *processed_size, uint32_t total_size);
void read_rom_PCE(void);
@ -233,7 +233,6 @@ void set_address_PCE(uint32_t address)
uint8_t read_byte_PCE(uint32_t address)
{
uint8_t ret;
uint8_t address_byte;
set_address_PCE(address);
@ -265,11 +264,8 @@ uint8_t read_byte_PCE(uint32_t address)
}
uint8_t write_byte_PCE(uint32_t address, uint8_t data)
void write_byte_PCE(uint32_t address, uint8_t data)
{
uint8_t ret;
uint8_t address_byte;
set_address_PCE(address);
// Arduino running at 16Mhz -> one nop = 62.5ns -> 1000ns total
@ -303,10 +299,6 @@ uint8_t write_byte_PCE(uint32_t address, uint8_t data)
// Enable Internal Pullups
PORTC = 0xFF;
//return read data
return ret;
}
//Confirm the size of ROM - 128Kb, 256Kb, 384Kb, 512Kb, 768Kb or 1024Kb

4
Cart_Reader/SNES.ino
View File

@ -11,8 +11,6 @@
#define HI 1
#define LO 0
// optimization-safe nop delay
#define NOP __asm__ __volatile__ ("nop\n\t")
/******************************************
Variables
*****************************************/
@ -613,8 +611,6 @@ void getCartInfo_SNES() {
void checkAltConf() {
char tempStr1[2];
char tempStr2[5];
char sizeStr[3];
char bankStr[3];
if (myFile.open("snes.txt", O_READ)) {
while (myFile.available()) {